Pantheism is the belief that God and the universe are equivalent (the same thing). A pantheist believes that everything that exists is a part of God or that God is a part of everything that exists. The name pantheism comes from the words theism (belief in God) and pan (all).

Any doctrine or philosophy that believes that the universe and everything in it is God is said to be pantheistic. Most pantheists believe the universe is sacred and the earth and nature are divine. Most of the early Greek philosophers from Thales on to Aristotle believed in some sort of pantheism.

Pantheism is an important part of many eastern religions such as Hinduism and Taoism.

Some western philosophers such as Baruch Spinoza and some scientists are pantheists.

Some Christians, Jews and Muslims are Pantheists. However, their majority believes that while God is in everything, there is more to God than just the universe.